The Experts below are selected from a list of 273 Experts worldwide ranked by ideXlab platform
B T Hjertaker - One of the best experts on this subject based on the ideXlab platform.
-
three phase flow measurement in the petroleum industry
Measurement Science and Technology, 2013Co-Authors: R Thorn, G A Johansen, B T HjertakerAbstract:The problem of how to accurately measure the flowrate of oil–gas–water mixtures in a pipeline remains one of the key challenges in the petroleum industry. This paper discusses why three-phase flow measurement is still important and why it remains a difficult problem to solve. The measurement strategies and principal base technologies currently used by commercial manufacturers are described, and research developments that could influence future flowmeter design are considered. Finally, future issues, which will need to be addressed by manufacturers and users of three-phase Flowmeters, are discussed.
Roger C. Baker - One of the best experts on this subject based on the ideXlab platform.
-
on the concept of virtual current as a means to enhance verification of electromagnetic Flowmeters
Measurement Science and Technology, 2011Co-Authors: Roger C. BakerAbstract:Electromagnetic Flowmeters are becoming increasingly widely used in the water industry and other industries which handle electrically conducting liquids. When installed they are often difficult to remove for calibration without disturbing the liquid flow. Interest has therefore increased in the possibility of in situ calibration. The result has been the development of verification which attempts to approach calibration. However, while it checks on magnetic field and amplification circuits, it does not check adequately on the internals of the flowmeter pipe. This paper considers the use of the virtual voltage, a key element of the weight function theory of the flowmeter, to identify changes which have occurred in the flow tube and its liner. These could include a deformed insulating liner to the flow tube, or a deposit in the tube resulting from solids in the flow. The equation for virtual voltage is solved using a finite difference approach and the results are checked using a tank to simulate the flow tube, and tests on a flow rig. The concept is shown to be promising as a means of approaching verification of calibration.
-
Further Studies of the Accuracy of Clamp-on Transit-Time Ultrasonic Flowmeters for Liquids
IEEE Transactions on Instrumentation and Measurement, 2009Co-Authors: Dharshanie V. Mahadeva, Roger C. Baker, Jim WoodhouseAbstract:The higher value of uncertainty in the flow measurement signal from transit-time clamp-on ultrasonic Flowmeters (USFMs) compared with transit-time spool-piece USFMs is due to several factors, some of which have been considered in this paper. However, the main focus of this paper has been on the effect of separation distance between the transducers on the flowmeter output signal. The sources of experimental error that might affect the validity of the data obtained for the transducer separation are examined, and then, use of ray-tracing and finite-difference models is made to examine this relationship theoretically.
Toshiharu Kagawa - One of the best experts on this subject based on the ideXlab platform.
-
a concentration measurement system for binary gas mixtures using two Flowmeters
Measurement Science and Technology, 2007Co-Authors: Shunpei Yamazaki, Tatsuya Funaki, Kenji Kawashima, Toshiharu KagawaAbstract:A system has been constructed for measurement of the gas concentration in a binary gas mixture and of the total flow rate of the gas mixture, using a venturi flowmeter and a laminar flowmeter. The flow rate and air concentration in tested gas mixtures, consisting of air and carbon dioxide or helium, are measured. The results are compared with reference values and the obtained results are found to be similar to those obtained using existing Flowmeters and concentration meters. The response of the system to the flow rate and the mixing ratio change is tested. The flow rate change response is approximately equivalent to existing Flowmeters, and the concentration change response is better than for existing meters.
R Thorn - One of the best experts on this subject based on the ideXlab platform.
-
three phase flow measurement in the petroleum industry
Measurement Science and Technology, 2013Co-Authors: R Thorn, G A Johansen, B T HjertakerAbstract:The problem of how to accurately measure the flowrate of oil–gas–water mixtures in a pipeline remains one of the key challenges in the petroleum industry. This paper discusses why three-phase flow measurement is still important and why it remains a difficult problem to solve. The measurement strategies and principal base technologies currently used by commercial manufacturers are described, and research developments that could influence future flowmeter design are considered. Finally, future issues, which will need to be addressed by manufacturers and users of three-phase Flowmeters, are discussed.
Shunpei Yamazaki - One of the best experts on this subject based on the ideXlab platform.
-
a concentration measurement system for binary gas mixtures using two Flowmeters
Measurement Science and Technology, 2007Co-Authors: Shunpei Yamazaki, Tatsuya Funaki, Kenji Kawashima, Toshiharu KagawaAbstract:A system has been constructed for measurement of the gas concentration in a binary gas mixture and of the total flow rate of the gas mixture, using a venturi flowmeter and a laminar flowmeter. The flow rate and air concentration in tested gas mixtures, consisting of air and carbon dioxide or helium, are measured. The results are compared with reference values and the obtained results are found to be similar to those obtained using existing Flowmeters and concentration meters. The response of the system to the flow rate and the mixing ratio change is tested. The flow rate change response is approximately equivalent to existing Flowmeters, and the concentration change response is better than for existing meters.